You will be given a definition of a task first, then some input of the task.
In this task, you're given a question, along with a context passage. The passage will not have a direct answer to the question, but can include some information and a clue for the answer. Assuming you can only obtain information about one entity in the passage, your job is to determine whether information from the passage can be used to answer the question. Indicate your choice as `a` for Yes or `b` for No.

Question: How many of the particles emitted in the process of transmuting Np to Pu have a charge? Passage:Heavy-water reactors may pose a greater risk of nuclear proliferation versus comparable light-water reactors due to the low neutron absorption properties of heavy water, discovered in 1937 by Hans von Halban and Otto Frisch. Occasionally, when an atom of U is exposed to neutron radiation, its nucleus will capture a neutron, changing it to U. The U then rapidly undergoes two β decays — both emitting an electron and an antineutrino, the first one transmuting the U into Np, and the second one transmuting the Np into Pu. Although this process takes place with other moderators such as ultra-pure graphite or beryllium, heavy water is by far the best. 

Output:
b